function s(){
    let tr = document.querySelectorAll('#table .tr');
    let all = document.querySelector('#all');
    let allnum = 0;

    for(let i = 0; i < tr.length; i++){
        var price = tr[i].children[2].children[0].innerHTML;
        var num = tr[i].children[3].children[0].value;
        var total = tr[i].children[4].children[0].innerHTML = price * num;

        console.log(total);
        allnum += total
    }
    console.log(allnum);
    all.innerHTML = allnum.toFixed(2);
}
s();

let num_all = document.querySelectorAll('#table .num');
for(let j = 0; j < num_all.length; j++){
    num_all[j].addEventListener('change',s)
}

let del_all = document.querySelectorAll('.tr .del');
for(let k = 0; k <del_all.length; k++){
    del_all[k].addEventListener('click',function(){
        console.log(this.parentNode.parentNode.parentNode);
        console.log(this.parentNode.parentNode);
        this.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode);

        s()
    })
}